Starter quiz
- The ______ is the starting figure, before a transformation has been applied.
- 'object' ✓
- Which transformation changes the sense of an object?
- translation
- reflection ✓
- rotation
- enlargement
-
- When describing a rotation, you must state three things: the centre of rotation, the amount of turn and the ______.
- 'direction of rotation' ✓
- "When an object is enlarged, the image will always end up further away from the centre of enlargement." Select true or false and a justifying statement.
- True
- False ✓
- you need to count the enlarged length from the centre of enlargement
- if the scale factor is between 0 and 1 lengths reduce. e.g. scale factor = 1/2 ✓
-
- A transformation has taken place in this diagram. Select all of the invariant properties.
- lengths ✓
- angles ✓
- position
- orientation
- sense
-
- Complete the descriptions below by matching the transformation with the detail needed to describe it fully.
- A rotation⇔by clockwise about (3,4). ✓
- A reflection⇔in the x-axis. ✓
- A translation⇔by ✓
- An enlargement⇔by scale factor 3 from (0, 0) ✓
Exit quiz
- Which transformation does this property table belong to?
- translation ✓
- reflection
- rotation
- enlargement
-
- Select the diagrams that could have been a rotation.
- The line of reflection is ______ from both the object and image.
- 'equidistant' ✓
- What transformation has occurred?
- 'reflection' ✓
- The object has been rotated about the point O, through __________.
- clockwise ✓
- anti-clockwise
- anti-clockwise ✓
- clockwise
-
- Choose the correct description for this transformation.
- An enlargement from point O by scale factor 3. ✓
- An enlargement from point O by scale factor .
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Worksheet
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Presentation
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Lesson Details
Key learning points
- There are clues that can be looked for to determine if a shape has been transformed.
- If the size has changed, one shape may be an enlargement of the other.
- If the orientation has changed, one shape may be a rotation of the other.
- If the shapes are mirrored, one shape may be a reflection of the other.
- If the shapes look identical but are in different places, one may be a translation of the other.
Common misconception
Students may confuse reflections and rotations depending on the object.
A reflection is the only transformation that changes the sense of the object, so check that first.
Keywords
Transformation - A transformation is a process that may change the size, orientation or position of a shape.
Congruent - If one shape can fit exactly on top of another using rotation, reflection or translation, then the shapes are congruent.
Invariant - A property of a shape is invariant if that property has not changed after the shape is transformed.
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